By using genre analysis, this study investigates the way writers use interpersonal metadiscourse to partly reveal their identity and examines their selected mode of interaction in two major academic fields: the social sciences and natural sciences. A total of 55 academic research articles from the SS and NS were selected as the corpus of this study. A comparison of the two disciplines was made, based on the use of interpersonal metadiscourse through `hedges', `emphatics' and `attitude markers'. The analysis showed that (...) the SS writers employed interpersonal metadiscourse more frequently than the NS writers. One-to-one comparison further showed that they varied significantly in their use of hedges and attitude markers but there was little difference in their use of emphatics. However, the use of hedges and emphatics was significantly different within each discipline. A qualitative in-depth analysis revealed that the choice of validity markers was closely related to the type of article being studied. (shrink)

This study aims to investigate the mediating role of psychological inflexibility as a transdiagnostic factor in the relationship between emotional dysregulation and sleep problems with symptoms of emotional disorders. A total of 500 subjects from three universities were selected by random multistage clustering, and they completed the Pittsburgh Sleep Quality Index, Difficulties in Emotional Regulation Scale, and Acceptance and Action Questionnaire–II, Inventory of Depression and Anxiety Symptoms. The results of correlation coefficients revealed that there is a positive and significant correlation (...) among emotional dysregulation, sleep problems, and psychological inflexibility with emotional disorders. In addition, the results showed that psychological inflexibility acts as a transdiagnostic factor that mediates the relationship between emotional dysregulation and sleep problems with symptoms of emotional disorders. These findings illustrate how emotional dysregulation and sleep problems affect emotional disorders through psychological inflexibility. (shrink)

The story of Somali immigrants in America. Since 2003, Abdi Roble - who came to the US from Somalia in 1989 - and Doug Rutledge have been documenting the lives of Somalis who have fled to camps in Kenya and to the US. This book follows the story of a family as they struggle to survive in Kenya and then in America.

Breaking bad news (BBN) to parents whose newborn has a major disease is an ethical dilemma. In Saudi Arabia, BBN about newborns is performed according to the parental preferences that have been reported from non-Arabic/non-Islamic countries. Saudi mothers' preferences about BBN have not yet been studied. Therefore, we aimed to elicit the preferences of Saudi mothers about BBN concerning newborns. We selected a convenience sample of 402 Saudi mothers, aged 18-50 years, who had no previous experience with BBN. We selected (...) them via a simple number-randomization scheme from the premises of a level III Saudi hospital between October of 2009 and January of 2011. We used a hypothetical situation (BBN about trisomy 21) to elicit their preferences about BBN concerning newborns via a structured verbal questionnaire composed of 12 multiple-choice questions. We expressed their preferences as percentages (95% confidence interval), and we used the Kendall's W test (W) to assess the degree of agreement in preferences. The Saudi mothers preferred that BBN be conducted with both parents together (64% [60-69]), albeit with weak levels of agreement (W = 0.29). They showed moderate agreement in their preferences that BBN should be conducted early (79% [75-83], W = 0.48), in detail (81% [77-85], W = 0.52), in person (88% [85-91], W = 0.58), and in a quiet setting (86% [83-90], W = 0.53). With extremely weak agreement, they preferred to have a known person present for support during BBN (56% [51-61], W = 0.01), to have close bodily contact with their babies (66% [61-70], W = 0.10), and to have no another patients present (64% [59-68], W = 0.08). They showed moderate levels of agreement in their desires to detail, in advance, their preferences about process of BBN by giving a reversible, written informed consent that could be utilized for guidance, if needed (80% [76-84], W = 0.36). In our experience, Saudi mothers' preferences about BBN concerning newborns are varied, suggesting that a "one-size-fits-all" approach is inappropriate. A reversible, written informed consent detailing their preferences about BBN that would be kept in their medical records and utilized for guidance, if needed, may be the best solution, given this level of diversity. These findings merit further study. (shrink)

At the intersection of social and virtue epistemology lies the important, yet so far entirely neglected, project of articulating the social dimensions of epistemic virtues. Perhaps the most obvious way in which epistemic virtues might be social is that they may be possessed by social collectives. We often speak of groups as if they could instantiate epistemic virtues. It is tempting to think of these expressions as ascribing virtues not to the groups themselves, but to their members. Adapting Margaret Gilbert's (...) arguments against individualist accounts of collective beliefs, I show that individualist accounts of group virtues are either too weak or too strong. I then formulate a non-individualist account modeled after Gilbert's influential account of collective beliefs. A crucial disanalogy between collective traits and beliefs, I argue, makes the success of this model unlikely. I conclude with some questions with which the future work on collective epistemic virtues should engage. (shrink)

What could Wittgenstein's body of texts contribute to the rapidly growing literature on life's meaning? This book not only examines Wittgenstein's scattered remarks about value and 'sense of life' but also argues that his philosophy and his 'way of seeing' has far reaching implications for the way current strands in the literature (naturalism, supernaturalism, and nihilism) approach the question of life's meaning. Hosseini argues that Wittgenstein's method of doing philosophy would suggest that the focus should be shifted from finding the (...) metaphysical and theoretical conditions of a meaningful life to an anthropological observation of the ways we enquire about life's meaning. Some of the ideas that Hosseini explores and examines are the relation between meaning in life and 'world-picture', the precedence of life over the intentional pursuit of meaning, the absence of doubt in everyday life, the rejection of theoretical dichotomy between the great and ordinary meaning, and the confessional nature of our enquiry into life's meaning. (shrink)

In this paper, I offer a reconstruction of Ghazālī's encounter with scepticism in the Deliverance from Error. For Ghazālī, I argue, radical scepticism about the possibility of knowledge ensues from intellectualist assumptions about the nature of justification. On the reading that I will propose, Ghazālī holds that foundational knowledge can only be justified via actions that lead to transformative experiences.

Paulo Freire’s philosophy of education, popularized via his magnum opus, The Pedagogy of the oppressed (2000 [1970]) ‘shocked’ the world, sort of constructively, with its trenchant, au courant and futuristic meditations on the onto-epistemological lives of the marginalized in Latin America, and by elliptical extension, across the world. The central tenets of Freire’s thought as reflectively (and reflexively) acting upon the world to transform it, are as current today as these were in the late 1960s, majorly because of the subjectively (...) active ways it interacts with our onto-epistemological locations and intentions. It is in appreciating such durable temporality about his philosophy that one can sense, indeed, thickly discern it trans-spatial and transcultural connections with the humanist African philosophy of Ubuntu and it educational foundations. Ubuntu in its across-Africa readings, represents both a practical and aspirational humanization of all people (more popularly, perceiving and practicing our personhoods through the personhoods of others) with the potential outcome, in the words of Desmond Tutu (in Battle, 2009), of the cessation of inter-people conflict and oppression. With these perspectives and prospects from Freire and Ubuntu, the intersecting subsets of the two are, I argue, thickly important with analytically discernible onto-epistemological and pedagogical connections and operations. (shrink)

The volume gives a detailed account of the available data of the biography of the Jewish philosopher ʿIzz al-Dawla Ibn Kammūna (d. 683/1284), provides an outline of his philosophcial thought, and analyzes in detail the reception of his thought and his writings among later Muslim and Jewish philosophers. An inventory of his entire œuvre provides detailed information on all extant manuscripts. The volume furthermore includes editions of nine of his writings.

The recent literature on epistemic virtues advances two general projects. The first is virtue epistemology, an attempt to explicate key epistemic notions in terms of epistemic virtue. The second is epistemic virtue theory, the conceptual and normative investigation of cognitive traits of character. While a great deal of work has been done in virtue epistemology, epistemic virtue theory still languishes in a state of neglect. Furthermore, the existing work is non-naturalistic. The present paper contributes to the development of a naturalistic (...) epistemic virtue theory by presenting a virtue-theoretic evaluation of need for cognition as informed by the relevant psychological studies. (shrink)

This book is about a Muslim Shi’i philosopher of the early 16th century, Najm al-Din Mahmud al-Nayrizi.

According to a common interpretation, most explicitly defended by Onora O’Neill and Patricia Kitcher, Kant held that epistemic obligations normatively depend on moral obligations. That is, were a rational agent not bound by any moral obligation, then she would not be bound by any epistemic obligation either. By contrast, in this paper, I argue that, according to Kant, some epistemic obligations are normatively independent from moral obligations, and are indeed normatively absolute. This view, which I call epistemicism, has two parts. (...) First, it claims that in the absence of other kinds of obligations, rational agents would still be bound by these epistemic obligations, i.e., that the latter are normatively independent. Second, it claims that, no matter what other obligations are at stake, rational agents are bound by these epistemic obligations, i.e., the normativity of these epistemic obligations is absolute in that it cannot be undercut by any moral or other sort of obligation. The argument turns on an exploratory reading of Kant’s remarks in “What Is Orientation in Thinking?” (1786) about the maxim of “thinking for oneself” as the “supreme touchstone of truth.” In contrast to O’Neill and Kitcher, I argue that if we interpret this maxim as stating the unifying principle of theoretical and practical reason, then we must interpret it as stating an epistemic, and not merely practical imperative. This result, I argue, vindicates epistemicism and illuminates interesting lessons about Kant’s conception of the category of “epistemic” norms. Further, it helps us make headway with Kant’s enigmatic remarks about the unity of practical and theoretical reason in the Groundwork, first and the second Critiques, and the Lectures on Logic. On my proposal, principles of the practical and theoretical uses of rea-son are unified through a formal epistemic principle. (shrink)

While there is general agreement about the list of epistemic virtues, there has been much controversy over what it is to be an epistemic virtue. Three competing theories have been offered: evaluational externalism, evaluational internalism, and mixed theories. A major problem with internalism, the focus of this paper, is that it disconnects the value of epistemic virtue from actual success in the real world (the Disconnection Problem). Relying on a novel thesis about the relation of “trying” and “exercise of virtue,” (...) James Montmarquet (1993; 2000) has offered, to my knowledge, the only solution to this problem. In this paper, I evaluate this solution by deriving from it an important implication and arguing that, if examined in the light of the recent work on self-control in philosophy and psychology, this implication proves problematic. I conclude by drawing a general lesson about the prospects of internalism and suggesting that in the absence of a satisfactory solution to the disconnection problem, externalism and mixed theories become more attractive. (shrink)

While there is general agreement about the list of epistemic virtues, there has been much controversy over what it is to be an epistemic virtue. Three competing theories have been offered: evaluational externalism, evaluational internalism, and mixed theories. A major problem with internalism, the focus of this paper, is that it disconnects the value of epistemic virtue from actual success in the real world (the Disconnection Problem). Relying on a novel thesis about the relation of “trying” and “exercise of virtue,” (...) James Montmarquet (1993; 2000) has offered, to my knowledge, the only solution to this problem. In this paper, I evaluate this solution by deriving from it an important implication and arguing that, if examined in the light of the recent work on self-control in philosophy and psychology, this implication proves problematic. I conclude by drawing a general lesson about the prospects of internalism and suggesting that in the absence of a satisfactory solution to the disconnection problem, externalism and mixed theories become more attractive. (shrink)

This study examined cross-sectional links of the theistic and non-theistic sanctification of marriage and positive and negative religious coping with marital adjustment for 316 married Muslims from Iran. Perceiving marriage to be a manifestation of God and reflective of sacred qualities as well as engaging in positive and negative religious/spiritual coping strategies each uniquely contributed variance to marital adjustment, after controlling for each other and global indicators of devotion to Islam, and demographic variables. Specifically, theistic sanctification, non-theistic sanctification, and positive (...) r/s coping were uniquely tied to higher marital adjustment whereas negative r/s coping was uniquely tied to lower marital adjustment theistic in a hierarchical regression model with all primary variables and controls entered. These findings replicate and extend prior findings on the perceived sanctity of marriage with US samples of predominantly Christians to Muslims living in the Middle East, and offer novel cross-cultural insights into the possible roles that sanctification of marriage and r/s coping may play for marital well-being for non-distressed married Muslims. (shrink)

The relationship between the photographic and optical images and time has been the subject of great deal of debate. Despite their differences, what many of these considerations have in common is their focus on the receiver, whether mechanical, biological, social or the memory and imagination of the observer. My aim here is to shift the emphasis from the receiver to the object or vista that is photographed or viewed and to explore how the constraints implied by our modern understanding of (...) the Universe, concerning space and time, impact on the way we perceive photographic and optical images. Viewed from this perspective, photographs can be treated as light projections of sections of the four-dimensional observable world onto two-dimensional spatial photographic or viewing surfaces. I shall show that despite the severe reduction that such projections imply, these modern considerations have the important consequence of bestowing a complex temporality upon optical images, including photographs. This realization dramatically changes the way we view photographs. I give examples of this rich temporality through considerations of terrestrial images – and more significantly images of the Sky, where these temporal effects are far more pronounced. (shrink)

In this paper, I offer a theory of autonomous agency that relies on the re-sources of a strongly cognitivist theory of intention and intentional action. On the proposed account, intentional action is a graded notion that is ex-plained via the agent’s degree of practical knowledge. In turn, autonomous agency is also a graded notion that is explained via the agent’s degree of practical understanding. The resulting theory can synthesize insights from both the hierarchical and the cognitivist theories of autonomy with (...) at least some aspects of the reason-responsiveness theories. Moreover, by treating practical knowledge and practical understanding as gradable no-tions, the paper offers a strategy to respond to enduring objections against cognitivism about intention, control, and autonomy. (shrink)

BackgroundEthical care provided by nurses to earthquake victims is one of the main subjects in nursing profession.ObjectivesGiven the information gap in this field, the present study is an attempt to explore the nurses’ experience of ethical care provided to victims of an earthquake.Research design and methodA hermeneutic phenomenological study was performed. The participants were 16 nurses involved in providing care to the injured in Kermanshah earthquake, Iran. They were selected using purposeful sampling, and in-depth and semi-structured interviews were carried out. (...) The transcribed interviews were analyzed based on the hermeneutic approach using the analysis method proposed by Diekelmann et al.Ethical considerationsThe study was approved by the Research Council and Ethics Committee of Urmia University of Medical Sciences, Iran.FindingsData analyses revealed four themes and 10 sub-themes that illustrated nurses’ experience of ethical care during earthquake. The themes were (1) Respecting humanistic values (sacrifice, stepping beyond task description, and voluntary work), (2) Commitment to ethics (honesty, confidentiality, and trustworthiness), (3) Respecting dignity of victims (respecting cultural values, maintaining privacy, having humanistic perspective, and effective communication), and (4) Spiritual support (helping patients to do religious rituals Psychological support).ConclusionThe results showed the nurses’ experience with providing care to earthquake victims. The findings underlined ethics and ethical values in providing nursing care during disasters. It is suggested that special courses on the importance of nursing ethics in critical situations be incorporated into nursing curriculums and in-service educations. (shrink)

I argue that practical knowledge can be understood as constituted by a kind of imagining. In particular, it is the knowledge of what I am doing when that knowledge is represented via extramental imagination. Two results follow. First, on this account, we can do justice both to the cognitive character and the practical character of practical knowledge. And second, we can identify a condition under which imagination becomes factive, and thus a source of ob-jective evidence. I develop this view by (...) extracting an account of self-knowledge via extramental imagination from the writings of Ibn ‘Arabi (1165-1240). (shrink)

An inventory of his entire oeuvre provides detailed information on the extant manuscripts. The volume furthermore includes editions of nine of his writings.

In this comment, we will focus on Greco’s brief for agent reliabilism in preference to simple reliabilism. Agent reliabilism differs from simple reliabilism primarily in requiring, not merely belief that results from a reliable process, but belief grounded in stable dispositions that make up the subject’s character.

The current study aimed to explore effective strategies for preventing cheating in online examinations by surveying students to determine their cheating strategies. A total of 406 Iranian students at BA, MA, and PhD levels in four programs, including English language teaching, English literature, Linguistics, and English language translation, participated in this study using a convenient sampling technique. The sample was drawn from 83 universities across all 31 provinces of Iran. The researchers developed a 30-item questionnaire and a 4-item interview to (...) collect data. The results revealed that searching in PDFs and using social media groups were the most commonly used cheating strategies. To prevent this form of academic dishonesty, teachers used various strategies, the most effective being the use of conceptual questions and one-by-one oral exams with turned-on webcams. The main reason for students to cheat was their desire to perform better. The implications of this study are relevant for educational stakeholders, particularly teachers, and students, in promoting academic integrity. (shrink)

Sad al-Din Dashtaki, and following him, Mulla Sadra Shirazi maintains that all real compositions are unified. After a short review of Dashtaki’s thesis, we concentrate on Mulla Sadra’s version. Mulla Sadra believes that Dashtaki’s version is not coherent and he declines the existence of real parts. We will argue that Mulla Sadra’s objections do not work and furthermore, all things said and done there is no difference between these two versions of the thesis of unified composition. If there is any (...) difference, it is about their theory of existence, not about their theory of composition. Sad al-Din Dashtaki, and following him, Mulla Sadra Shirazi maintains that all real compositions are unified. After a short review of Dashtaki’s thesis, we concentrate on Mulla Sadra’s version. Mulla Sadra believes that Dashtaki’s version is not coherent and he declines the existence of real parts. We will argue that Mulla Sadra’s objections do not work and furthermore, all things said and done there is no difference between these two versions of the thesis of unified composition. If there is any difference, it is about their theory of existence, not about their theory of composition. (shrink)

Putting the principles of multisensory teaching into practice, this study investigated the effect of audio-visual vocabulary repetition on L2 sentence comprehension. Forty participants were randomly assigned to experimental and control groups. A sensory-based model of instruction was used to teach a list of unfamiliar vocabularies to the two groups. Following the instruction, the experimental group repeated the instructed words twice, while the control group received no vocabulary repetition. Afterward, their electrophysiological neural activities were recorded through electroencephalography while doing a sentence (...) acceptability judgment task with 216 sentences under acceptable and unacceptable conditions. A one-way analysis of variance, a multivariate analysis of variance, and a Bayesian repeated-measures ANOVA were used to compare the behavioral and neurocognitive responses [N400 as the main language-related event-related brain potential effect] of the two groups. The results showed no significant N400 amplitude difference in favor of any of the groups. The findings corroborated the ineffectiveness of two repetitions preceded by multisensory instruction on L2 sentence comprehension. (shrink)

_Philosophy in Qajar Iran_ offers an account of the life, works and philosophical thoughts of major philosophers of Iran between the late eighteenth and the early twentieth centuries.

We consider the domain of applicability of general relativity (GR), as a classical theory of gravity, by considering its applications to a variety of settings of physical interest as well as its relationship with real observations. We argue that, as it stands, GR is deficient whether it is treated as a microscopic or a macroscopic theory of gravity. We briefly discuss some recent attempts at removing this shortcoming through the construction of a macroscopic theory of gravity. We point out that (...) such macroscopic extensions of GR are likely to be nonunique and involve non-Riemannian geometrical frameworks. (shrink)

Infinity, in various guises, has been invoked recently in order to ‘explain’ a number of important questions regarding observable phenomena in science, and in particular in cosmology. Such explanations are by their nature speculative. Here we introduce the notions of relative infinity, closure, and economy of explanation and ask: to what extent explanations involving relative or real constructed infinities can be treated as reasonable?

Containing both theoretical discussions of globalization and specific case analyses of individual African countries, this collection of essays examines the intersections of African education and globalization with multiple analytical and geographical emphases and intentions.

In this article, we argue that although Bohr's version of the Copenhagen interpretation is in line with several key elements of logical positivism, pragmatism is the closest approximation to a classification of the Copenhagen interpretation, whether or not pragmatists directly influenced the key figures of the interpretation. Pragmatism already encompasses important elements of operationalism and logical positivism, especially the liberalized Carnapian reading of logical positivism. We suggest that some elements of the Copenhagen interpretation, which are in line with logical positivism, (...) are also supported by pragmatism. Some of these elements are empirical realism, fallibilism, holism, and instrumentalism. However, pragmatism goes beyond logical positivism in espousing some other key elements of the Copenhagen interpretation, though imperfectly, such as the correspondence principle, complementarity, and indeterminism. (shrink)

Sayyid Sadr al-din Mohammad Dashtaki Shirazi is the inventor of the division of composition into unified composition and composition by join. With this division, Dashtaki has expressed a new theory about the composition of the material object from first matter and form, as well as the composition of man from soul and body, and considers these compositions as an alliance and unification, not simply the parts joining to each other. In this paper, we will present Dashtaki’s arguments on the theory (...) of unified composition. We will also examine three objections to this theory and responses to them. Finally, we will examine the background of this theory in Bahmanyar's phrases. Dashtaki believes that when the components in the compound have a real plurality, i.e. each one exists separately from the other, a composition by join is created, such as the composition of a house from numerous clays. But if the components in the compound are united and none of them are separate from the others and exists actually, the resulting composition will be an alliance and union. He believes that in the unified composition, every component is identical to any other component and is identical to the whole. Accordingly, Reza is a unique being, both human and writer. In order to achieve a composition, a plurality is needed and in order to form a single composition, there must be plural components related to each other. An important question is that, principally how is a composition possible, if unified composition comes to existence only when the components are made united with each other and with the whole? In other words, unified composition is not possible, because the first condition of the acquisition of the composition, i.e., the plurality of the constituent components, is not satisfied. Dashtaki strives to express a difference between the components in the union compound. He believes that the conditions of the realization and the survival of the components are different, and that is enough for them to be different. In Dashtaki's point of view, in the unified composition the components are analytical, not being separate and plural, in reality. In other words, the components do not have actual and "in-the-world" plurality, which means that it is our intellect that separates them and looks at them as independent objects. Therefore, unity and identity are in-the-world and plurality and discernibility are analytical and in the mind. Dashtaki's first argument for his theory in general is as follows: the three major material objects (solid, plant and animal) are undoubtedly real compounds. But in these compositions, components exist potentially, and in a unified composition, components do not exist actually. Therefore, these objects are unified compounds. The second argument is that the accuracy of predication implies unity. In the unified composition, the components are identical with the whole, and therefore, the components can be predicated to the composition. In Dashtaki's view, if A is predicated to B, then it could be concluded that they are identical and unified. The first objection to this theory is that the unity is incompatible with causality. From the perspective of the Peripatetics, form is the cause of the matter, and this is incompatible with the union of the two. Dashtaki states that in case of causality, there is no need for cause and effect to be two different and discernible entities, but a single entity may be from one aspect the cause and, from another, the effect. In other words, the foresaid causality is analytical causality. When mind analyses something, and then finds analytical components, it can see between those analytical and intellectual components, causality, and find some of them as the cause of the others. The second objection is the incorrectness of the unity in compounds with components not being similar. only in the compounds having similar parts, one can accept the unity of matter and form. For example, in compounds such as horses, it is not possible to accept the union of matter and form, because in horses, there are components with different natures, such as bones, flesh and nerves. Unity of These parts with each other and with the whole is not plausible. Dashtaki’s respond is that the horse is also a natural unit and has no actual plurality. Components having similar or different natures does not make any difference. According to the theory of unified composition, the horse's components are united with the horse's form and have only analytical plurality. Horse’s components are just analytical components, not actual, independent ones. The third objection is the incompatibility of the actual existence of components with their unity. But Dashtaki maintains that a unique actual personal entity cannot have actual plural components. He states that compounds such as horses exist objectively, but objective and real existing is divided into two kinds: dependent existence, and independent existence as a single real thing. Therefore, the two characteristics of "being a component" and "being independent" are incompatible and do not come together in a real being. Dashtaki has also quoted phrases from Bahmanyar to confirm his point of view. Bahmanyar says that the properties of an animal belong to the whole and compound, not to each component. For example, it is a horse that feels, not its bone or brain, as the eye is also a compound, but seeing is the work of the eye, not the work of any of its components. Therefore, the animal, which is something compound, has characteristics that none of its components have. So the animal is something over and above its components. Bahmanyar thinks the components in the animal are potential. Then he states a general rule: any compound in which unity is real, its components do potentially exist. Therefore, Bahmanyar considers the body parts of the living organism as a potential being and generally believes that the components of any compound that have true unity are potential. The potentiality of the components in a real compound does not that mean that the components are destroyed and a new thing is produced. The components are also available, but they do not have the effects they had separately before the composition comes into existence. In other words, the components have found a unique identity together and therefore have a new effect.. It seems that Bahmanyar has expressed the same idea that Dashtaki is looking for in the theory of unified composition. Therefore, it can be said that before Dashtaki, Bahmanyar has come up with the thought of a unity. Of course, Bahmanyar has not explained much about this, and Dashtaki is the first who has organized and completed this idea as a philosophical theory. (shrink)

The human masticatory system is a complex functional unit characterized by a multitude of skeletal components, muscles, soft tissues, and teeth. Muscle activation dynamics cannot be directly measured on live human subjects due to ethical, safety, and accessibility limitations. Therefore, estimation of muscle activations and their resultant forces is a longstanding and active area of research. Reinforcement learning (RL) is an adaptive learning strategy which is inspired by the behavioral psychology and enables an agent to learn the dynamics of an (...) unknown system via policy-driven explorations. The RL framework is a well-formulated closed-loop system where high capacity neural networks are trained with the feedback mechanism of rewards to learn relatively complex actuation patterns. In this work, we are building on a deep RL algorithm, known as the Soft Actor-Critic, to learn the inverse dynamics of a simulated masticatory system, i.e., learn the activation patterns that drive the jaw to its desired location. The outcome of the proposed training procedure is a parametric neural model which acts as the brain of the biomechanical system. We demonstrate the model’s ability to navigate the feasible three-dimensional (3D) envelope of motion with sub-millimeter accuracies. We also introduce a performance analysis platform consisting of a set of quantitative metrics to assess the functionalities of a given simulated masticatory system. This platform assesses the range of motion, metabolic efficiency, the agility of motion, the symmetry of activations, and the accuracy of reaching the desired target positions. We demonstrate how the model learns more metabolically efficient policies by integrating a force regularization term in the RL reward. We also demonstrate the inverse correlation between the metabolic efficiency of the models and their agility and range of motion. The presented masticatory model and the proposed RL training mechanism are valuable tools for the analysis of mastication and other biomechanical systems. We see this framework’s potential in facilitating the functional analyses aspects of surgical treatment planning and predicting the rehabilitation performance in post-operative subjects. (shrink)

Eigenfeatures are created by the principal component approach (PCA) used on objects described by a low-level code (i.e., pixels, Gabor jets). We suggest that eigenfeatures act like the flexible features described by Schyns et al. They are particularly suited for face processing and give rise to class-specific effects such as the other-race effect. The PCA approach can be modified to accommodate top-down constraints.

Knowledge management is important in the construction industry, but there is a dramatic gap between rhetoric and reality, highlighting mistaken expectations of technology. We report on a case study of a major construction company. The UK construction industry, with scarce academic qualifications, and limited use of IT, depends on knowledge sharing, and, crucially, on tacit knowledge. Economic crisis presents particular problems, and recent trends in work organization have far-reaching implications. The industry depends on human knowledge, with limited systems support. A (...) shared concern for health and safety provides the surest guarantee of sustainability of both knowledge and the company. (shrink)